| Sudden death of entanglement of two atoms interacting with thermal fields |
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| 作者姓名： | 罗成立 缪龙 郑小兰 陈子翃 廖长庚 |
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| 作者单位： | Department of Physics,Fuzhou University |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 10974028), the Natural Science Foundation of
Fujian Province of China (Grant No. 2009J06002), and the Funds from the State Key Laboratory Breeding Base of Photocatalysis. |
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| 摘 要： | We investigate the entanglement dynamics of two initially entangled atoms each interacting with a thermal field.We show that the two entangled atoms become completely disentangled in a finite time and that the lost information cannot return to the atomic system when the mean photon number of the thermal field exceeds a critical value (3.3584),even though the whole system is lossless.Then we study how the detuning between the atomic transition frequency and the field frequency and the disparity between two coupling rates would affect the evolution of the entanglement of the atomic system.
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| 关 键 词： | entanglement sudden death thermal field asymmetric detuning |
| 收稿时间： | 9/9/2010 12:00:00 AM |
| 修稿时间： | 3/2/2011 12:00:00 AM |
Sudden death of entanglement of two atoms interacting with thermal fields |
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| Luo Cheng-Li,Miao Long,Zheng Xiao-Lan,Chen Zi-Hong and Liao Chang-Geng.Sudden death of entanglement of two atoms interacting with thermal fields[J].Chinese Physics B,2011,20(8):80303-080303. |
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| Authors: | Luo Cheng-Li Miao Long Zheng Xiao-Lan Chen Zi-Hong and Liao Chang-Geng |
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| Institution: | Department of Physics, Fuzhou University, Fuzhou 350002, China;Department of Physics, Fuzhou University, Fuzhou 350002, China;Department of Physics, Fuzhou University, Fuzhou 350002, China;Department of Physics, Fuzhou University, Fuzhou 350002, China;Department of Physics, Fuzhou University, Fuzhou 350002, China |
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| Abstract: | We investigate the entanglement dynamics of two initially entangled atoms each interacting with a thermal field. We show that the two entangled atoms become completely disentangled in a finite time and that the lost information cannot return to the atomic system when the mean photon number of the thermal field exceeds a critical value (3.3584), even though the whole system is lossless. Then we study how the detuning between the atomic transition frequency and the field frequency and the disparity between two coupling rates would affect the evolution of the entanglement of the atomic system. |
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| Keywords: | entanglement sudden death thermal field asymmetric detuning |
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